OBD2 Fuel Enrichment Mode - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 08-26-2008, 10:21 AM   #1
Registered Member
 
Join Date: Nov 2007
Posts: 1,111
Country: United States
Send a message via AIM to dkjones96
OBD2 Fuel Enrichment Mode

Does anybody know where I can find more information about this? I want to know what mixtures it aims for and such or if it is a pre-programmed map.

I know my car will do it under heavy load for more power and to an even greater extent if the engine begins to overheat to keep it cool along with ignition timing retarding but I can't find anywhere that will give further details...
__________________

__________________
- Kyle
dkjones96 is offline   Reply With Quote
Old 08-26-2008, 08:55 PM   #2
Registered Member
 
suspendedhatch's Avatar
 
Join Date: Apr 2008
Posts: 445
Country: United States
Send a message via AIM to suspendedhatch
I haven't heard of anything so much as a "mode"... what you are describing is built into every tune. It's not exclusive to OBD2. You NEED more fuel under many conditions to prevent the engine from blowing up or simply to keep it running smoothly. Cold start, a sudden throttle increase (even just leaving from a stop at a normal pace), to stabilize idle immediately following startup, heavy load or boost, when knock is detected, as a fail safe aka limp mode, when coolant and/or air temps drop too low, when an alternative fuel is detected on a flex fuel vehicle, etc etc. This isn't something you would ever want to tamper with or override, even though some manufacturers may be criticized as being overly cautious.

All I can suggest is that you get a wideband O2 sensor / gauge combination like the one made by AEM. You can leave your stock O2 intact and simply have a bung welded nearby for the additional sensor. Then you can monitor your air fuel ratio and learn to avoid getting into situations that require rich mixtures.
__________________

__________________

Civic VX, D15Z7, 5 Speed LSD, AEM EMS, AEM UEGO, AEM Twin Fire, Distributor-less, Waste Spark
suspendedhatch is offline   Reply With Quote
Old 08-27-2008, 01:10 PM   #3
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
What about tuning out open loop at WOT? Is it necessary to have open loop and fuel enrichment when at WOT or can one tune it out and accept a power loss without endangering the engine?
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 08-27-2008, 01:42 PM   #4
Registered Member
 
Join Date: Nov 2007
Posts: 1,111
Country: United States
Send a message via AIM to dkjones96
We should be able to accept the power loss. My car for example goes into its power enrichment mode as low as 75% throttle which is why my exahsut pipe has so much black on it... i'm always running ~75-85% on acceleration.
__________________
- Kyle
dkjones96 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 08:21 PM
Missing Fuelup jmonty Fuelly Web Support and Community News 3 05-27-2009 05:10 AM
All Licensed Drivers terrapin Fuelly Web Support and Community News 0 08-07-2008 10:49 AM
Why did it take me so long to find this place? Baranfin Introduce Yourself - New member Welcome 6 05-31-2008 05:17 PM
hi new member here and ive got some sick ideas! csrmel Introduce Yourself - New member Welcome 6 10-18-2007 02:23 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:28 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.